The Kyocera 170HG7 end mill set contains 4 high speed steel end mills with straight flutes in diameters of 1/8", 3/16", 1/4", and 5/16". The end mills have a TiAIN coating for wear resistance when milling steel, stainless steel, cast iron, aluminum, and other non-ferrous metals. The end mills feature a 135 degree split point geometry for plunging and slotting applications. The overall length of each end mill is 2-1/2". This 4 piece Kyocera end mill set is made in Japan and comes in a plastic case.